Question

A four-strand no. 40 roller chain transmits power from a 40-tooth driving sprocket to a driven sprocket with a speed ratio of 2. Estimate the chain length if the center-to-center distance is 600 mm.

Answer 1

to solve this question, we will obtain the pitch value of the given chain.

for pitch value, we will refer design data of ASME Roller chain standard size table

pitch = 12.70 mm = p

Number of tooth on driving sprocket = 40 = N1

Speed ratio = 2 ; we know that speed ratio =

therefore ; Number of tooth on output or Driven sprocket = 80 = N2

Center Distance = (C) = 600 mm

Chain length =

Putting all these value of C, p, N1 , N2

L = 1972.8839 mm